JPH0695790B2 - Remote monitoring and control device terminals - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a central control unit and a plurality of monitoring and control terminals connected by a pair of signal lines to transmit monitoring data and control data by time division multiplexing. The present invention relates to a terminal device of a remote monitoring control device.

BACKGROUND ART Conventionally, a remote control device of this type has a central control device,
Connect a plurality of monitoring and control terminals with unique addresses with a pair of signal lines, access each terminal from the central control device as appropriate, and send the monitoring data returned from each monitoring terminal. While receiving, it transmits control data for controlling the load based on the monitoring data to each control terminal,
The control terminal drives the load control relay on and off based on this control data. However, in such a remote monitoring control device, there is a problem that the load control relay cannot directly control the load by directly receiving a transmission signal, that is, control data from the central control device.

[Object of the Invention] The present invention has been provided in view of the above-mentioned point, and a load control relay is built in a control terminal to form a relay unit, so that the central control unit controls the load. It is an object of the present invention to provide a terminal device of a remote monitoring control device that drives a relay.

DISCLOSURE OF THE INVENTION (Structure) According to the present invention, a central control device and a plurality of monitoring and control terminals to which unique addresses are set are connected by a pair of signal lines. In a remote monitoring control device in which the control data of the load control operation switch and the control data of the load control relay based on the monitoring data are time-division-multiplexed and transmitted by appropriately accessing the load control relay. It is characterized in that a relay unit is built in the terminal device.

(Embodiment) First, a remote monitoring control device according to the present invention will be described with reference to FIGS. FIG. 7 shows a schematic configuration diagram of an embodiment of the present invention, and FIG. 8 shows a more simplified schematic configuration diagram. The central control unit 1 and a plurality of monitoring devices to which unique addresses are set are shown. The terminal unit 2 for control and the terminal unit 3 for control are connected by a pair of signal lines 4. The transmission signal Vs sent from the central controller 1 to the signal line 4 is, as shown in FIG. 11 (a), a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, and a terminal device 2. , ± 3V consisting of address data signal AD for calling 3 and 3, control data signal CD for controlling load 7, checksum data signal CS and return standby signal WT for setting return signal period from terminals 2 and 3 Is a time division multiplexed signal of
Data is transmitted by pulse width modulation. Each of the terminals 2 and 3 takes in control data of the transmission signal Vs when the address data of the transmission signal Vs received via the signal line 4 and its own unique address data match, and returns the transmission signal Vs. In synchronization with the standby signal WT, the monitor data signal is sent back as a current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance).

Further, the central control unit 1 receives the dummy signal transmitting means for constantly transmitting the dummy transmission signal Vs and the interrupt signal Vi returned from any of the monitoring terminals 2 as shown in FIG. 11 (b). And an interrupt processing means for detecting the interrupt generating terminal device 2 and accessing the terminal device 2 to send back monitoring data when the monitoring terminal device 2 receives a monitoring input. An interrupt signal Vi is generated in synchronization with the start pulse signal ST of the dummy transmission signal Vs, and its own unique address data is returned in synchronization with the return signal WT of the address confirmation mode transmission signal Vs from the central controller 1. Interrupt generating means and a data return for returning the monitoring data corresponding to the monitoring input when the interrupt access mode transmission signal Vs in response to the interrupt is transmitted from the central control unit 1. And means are provided, so as to create control data to be transmitted to the control terminal unit 3 on the basis of the monitoring data sent back from the monitoring terminal device 2 to the central control unit 1.

Further, in the monitoring terminal device 2, an individual operation switch 5a for individually controlling a load 7 such as a lighting, an individual operation selector switch 5b for individually controlling a plurality of loads 7, and a plurality of loads 7 are collectively provided. Pattern switch
5c, dimmer switch 5d for dimming the lighting load 7 such as incandescent lamp, fluorescent lamp, and lighting load 7 temporarily (30 sec or 300 se
The monitoring input means such as the temporary lighting switch 5e that lights up in c), the delay switch 5f that delays the turn-off timing of the lighting load 7 for a fixed time (30 seconds or 300 seconds), and the pattern input switch 5g are connected.
5g is timer setting unit 5h, calendar type time switch
5i, indoor EE switch 5j, daylight sensor 5k output, and other sequence control data are selectively input (in a preset pattern). The booster 10 inserted in the signal line 4 ensures the attenuation of the transmission signal Vs. The interlocking switch terminal 3'connected to the end of the signal line 4 controls the connection with the signal line 4'of another remote monitoring device of the same specification. It is designed to select whether or not to connect both signal lines 4 and 4'by the transmission signal Vs for
When 4'is connected, the system scale becomes large and the terminal connected from the central control unit 1 to both signal lines 4, 4 '
It will be possible to monitor and control a few items, and for example, it will be possible to perform wide-range pattern control across both remote control devices.

The remote control switch 8 is designed to output a control output equivalent to the control output of the control terminal device 3, and the load control remote control relays 6a ₁ , 6a ₂ , ... 6b ₁ , 6b are provided by both control outputs. ₂ ,
...... is controlled, and the load 7 is controlled in parallel. In the figure, 27 is a control terminal device 3 and a remote control relay.
6a ₁ , 6a ₂ ...... 6b ₁ , 6b ₂ is a transformer for supplying electric power, central control unit 1, control terminal 3, remote control relays 6a ₁ , 6a ₂ ...
6b ₁ and 6b ₂ are arranged in the distribution board 29. Signal transmission between the monitoring terminal device 2 and the monitoring input means may be performed by using a wireless transmitter / receiver, and the pattern switch 5c is turned on or off all the loads 7 at once or on / off. A switch may be provided. FIG. 14 shows a schematic configuration diagram in which this remote control device is installed in a building, and a distribution board 29 in which a selector switch 5b for comprehensive load control and a central control device 1 are built in a management room 29 , And the pattern switch 5c, selector switch 5b, daylight sensor on each floor via the signal line 4.
5k, a crime prevention sensor 5k ', a disaster prevention sensor 5k ", etc. are arranged. Therefore, the selector switch 5b enables centralized control and operation at other locations.

FIG. 9 is a circuit diagram of a specific configuration example of the central controller 1,
The central control device 1 includes a signal processing circuit 13 including a CPU, a transmission signal generating unit 14, a reception signal determining circuit 15, a transmitting / receiving circuit 16 including a signal transmitting circuit 16a and a signal receiving circuit 16b,
The power supply circuit 17 and the dummy signal transmitting means and the interrupt processing means are realized by the signal processing circuit 13. The signal transmission circuit 16a of the transmission / reception circuit 16 includes a photocoupler PC ₁ , transistors Q _{0 to} O ₄ , and operational amplifiers OP ₁ and OP _2.
And the three-terminal regulators VR ₂ and VR ₃ and the transistors Q ₁ and Q ₄ or the transistors Q ₁ and Q ₄ depending on “H” and “L” of the pulse-width modulated data signal output from the transmission signal generation unit 14. When Q ₂ and Q ₃ are turned on, a multi-polar transmission signal Vs is formed, and the three-terminal regulators VR ₂ and VR ₃ make it a constant voltage and send it to the signal line 4.

On the other hand, the signal receiving circuit 16b, the photo-coupler PC _2, the operational amplifier OP _3, OP _4, the diode D ₁ to D _3, the Zener diode ZD ₁
And a light emitting diode LD ₁
The current-mode return signal returned from the signal lines 3 and 2 as the current-mode signal is detected by the return-signal detection circuit including the current detection resistor R ₁ , zener diode ZD ₁ and operational amplifier OP _3. There is. That is, when the voltage across the current detecting resistor R ₁ through which the signal current flows exceeds the value obtained by adding the voltage of the resistor R ₁ due to the average signal current to the reference voltage set by the Zener diode ZD ₁ (with appropriate impedance When a relatively large current (> average current + predetermined value) flows due to a short circuit between the signal lines 4 via the operational amplifier OP
₃ output goes to "L", the operation display light-emitting diodes LD ₁ and the photocoupler PC ₂ of the light emitting diode is lit, for operation indicates that the return signal is received the light emitting diode LD ₁
Is displayed, the received signal is displayed and the phototransistor and transistor Q of photocoupler PC ₂ are displayed.
_The signal is input to the reception signal discrimination circuit 15 via ₅ . The reference voltage set by Zener diode ZD _{1 is} divided by resistors R ₂ and R ₃ , and the current detection resistor that is input via the noise elimination circuit consisting of resistor R ₄ and capacitor C _1. Operational amplifier OP that compares the voltage across R _1
4 and the diode D ₂ form a short circuit detection circuit for the signal line 4, and when the signal line 4 is short-circuited and a large short circuit current flows, the voltage across the current detection resistor R ₁ exceeds the divided voltage. , The output of the operational amplifier OP ₄ becomes “L”, the light emitting diode LD ₁ for operation display and the light emitting diode of the photocoupler PC ₂ are turned on through the diode D ₃ for backflow prevention, and the light emitting diode LD ₁ for operation display continues. The lighting indicates that the signal line 4 is short-circuited.

The power supply circuit 17 is formed by the diode bridge DB _1, DB ₂ and 3 terminal regulator VR _1, feeds power to the transceiver circuit 16 signals power AC ₁ rectifying and smoothing, the control power supply AC ₂ Is rectified and smoothed to obtain a constant voltage, and the signal processing circuit 13, the transmission signal generation circuit 14, and the reception determination circuit 15 are supplied with power.

FIG. 10 (a) is a circuit diagram showing a specific configuration example of the control terminal device 3 for controlling the remote control relay 6 by receiving the transmission signal Vs from the central control device 1, and the control terminal device 3 is A signal receiving circuit 20 for receiving the transmission signal Vs transmitted via the line 4, and an address setting circuit 21 for setting a unique address
And a signal processing circuit that detects the match between the address data of the transmission signal Vs and the unique address, captures the control data when the address match is detected to form the control output Vc, and forms the return monitoring data based on the monitoring input. 22, a pulse conversion circuit 23 that forms a set pulse signal Vcs and a reset pulse signal Vcr of the remote control relay 6 in accordance with "H" and "L" of the control output Vc, and a drive signal that drives the remote control relay 6 A relay drive circuit 24 including transistors Qa and Qb and photothyristors PSa and PSb, a monitoring input circuit 25 including a photocoupler PC ₃ for inputting monitoring information indicating the operating state of the remote control relay 6, and a return standby signal for the transmission signal Vs. It is formed by a return circuit 26 that returns the monitoring data signal as a current mode signal to the central control unit 1 during the return signal period set by WT, and When the terminal device 3 is accessed from the central control unit 1, the terminal device 3 takes in the transmitted control data and outputs a drive signal for the remote control relay 6 for turning the load 7 on and off, and indicates the operating state of the remote control relay 6. The monitoring data is sent back to the central control unit 1.

The configuration of the monitoring terminal device 2 is substantially the same as that of the control terminal device 3 described above, except that it has an interrupt process for transmitting an interrupt signal Vi and returning monitoring data when a monitoring input is received. This is to realize the interrupt generating means and the data returning means to be performed by the signal processing circuit 22, and the pulse conversion circuit 23 and the drive circuit 24 are naturally omitted. Further, the signal input to the signal processing circuit 22 at the monitoring input terminal can be a continuous signal or a pulse signal.

By the way, the remote control relay 6 for controlling the on / off of the load 7 includes a latching relay RR having an interlocking main contact ra and an auxiliary contact rb, and an exciting coil L of the latching relay RR.
Connected in series with the current switching diodes Da, which is formed by the Db, the AC power source AC ₃ which is stepped down by transformer 27
When a set current of a predetermined level flows through the diode Da from the diode Da to the exciting coil for a predetermined time, the main contact ra is turned on to supply power to the load 7 from the commercial power supply AC, and the auxiliary contact.
rb is inverted and the diode Db is switched and connected to the exciting coil L, while the main contact ra is turned off when a reset current flows from the AC power source AC ₃ to the exciting coil L via the diode Db. Power supply to the load 7 is stopped, the auxiliary contact rb is reversed, and the exciting coil L receives a diode.
Da is switched and connected. Therefore, the photothyristor PSa of the drive circuit 24 of the control terminal 3 is
When the switch is turned on, the latching relay RR of the remote control relay 6 is set to the on side, the load 7 is turned on, and when the photothyristor PSb is turned on, the latching relay R is turned on.
R is reset to the off side and the load 7 is turned off. In this case, since the remote control relay 6 is formed by using the latching relay RR, the drive circuit
It can also be controlled by a remote control switch 8'which generates a signal equivalent to the set signal and the reset signal output from 24, and the load 7 includes the signal line 4 and the control terminal 3
It is controlled by the control data transmitted from the central control unit 1 via the control unit and the control output of the remote control switch 8 '. In the figure, one remote control relay 6
Although only the control output for controlling the
A control output for controlling each of the four remote control relays 6 is output from the signal processing circuit.

Figure 10 (b) is' a specific example of the circuit configuration of the push button switch SW ₀ and the diode Da 'remote control switch 8, the set consisting of Db', and the reset signal generating circuit, a light emitting diode LD
a, LDb and diodes Da ″, Db ″ are connected in series, and an on / off display circuit is formed. It goes without saying that the remote controller switch 8'may be configured by a circuit provided with an on switch and an off switch in place of the transistors Qa and Qb of the drive circuit 24 of the control terminal device 3.

The operation of the embodiment will be specifically described below with reference to the flowcharts shown in FIGS. 12 and 13. Now, the dummy transmission signal Vs in which the address data other than the unique addresses of the terminals 2 and 3 is set is constantly transmitted from the central control unit 1, and the power is turned on to the central control unit 1 to perform the monitoring control operation. When it starts, first, the central controller 1
Each control terminal 3 is accessed by sequentially accessing each control terminal 3.
Check the load control status of the load 7 and display the operation display of the operation display lamp (not shown) provided corresponding to each load 7
Match the operating state of. Next, the dummy signal transmitting means of the central control unit 1 is used to monitor or control terminals 2, 3
A dummy transmission signal Vs for accessing a vacant address other than the unique address set to is sent to the signal line 4.
In the normal state in which the dummy transmission signal Vs is constantly transmitted in this way, since the address match cannot be obtained between the terminals 2 and 3, the data transfer with the central control unit 1 is not performed, and the standby state is set. Has become. When a monitoring input is input to any one of the monitoring terminals 2 from the monitoring input means, for example, an operation switch for turning on the load 7 is pressed, and an ON operation signal is input to the monitoring input terminal of the monitoring terminal 2. When is input, the interrupt generating means formed in the signal processing circuit 22 of the monitoring terminal 2 immediately generates the interrupt signal Vi and synchronizes with the signal line 4 in synchronization with the start pulse signal ST of the dummy transmission signal Vs. Send to. The interrupt processing means of the central control unit 1 accesses the interrupt-generating terminal device 2 to return the address data in order to detect the interrupt-generating terminal device 2 when the interrupt signal Vi from the monitoring terminal device 2 is received. The transmission signal Vs in the address confirmation mode is transmitted.

The address confirmation mode transmission signal Vs is received by the interrupt generation terminal device 2, and the interrupt generation means of the interrupt generation terminal device 2 synchronizes with the return standby signal WT of the address confirmation mode transmission signal Vs to uniquely identify itself. Return address data. The interrupt processing means of the central control unit 1 which has received the returned unique address data transmits the transmission signal Vs in the interrupt access mode to the specified interrupt terminal 2. Next, when the transmission signal Vs for interrupt access is received, the data returning means of the interrupt generation terminal 2 returns the monitoring data corresponding to the monitoring input to the central control unit 1 in synchronization with the return standby signal WT. To do. In this way, the interrupt generation terminal 2 is connected to the central controller 1
The monitoring data sent back to the device is signal-processed by the signal processing circuit 13 of the central control unit 1 to create control data for controlling the load 7 and send out a transmission signal Vs for accessing the corresponding control terminal 3. . In the control terminal 3 that has received this transmission signal Vs, the remote control relay 6 is controlled based on the transmitted control data to turn on / off the load 7, and the monitoring data indicating the control state of the load 7 is centrally displayed. It is returned to the control device 1. In the central controller 1, the operation display lamp is controlled based on the monitoring data returned from the control terminal device 3 to update the operation status display of the load 7, and a series of monitoring control operations are ended to complete the dummy transmission signal Vs. Returns to the standby state in which is always transmitted.

As described above, in the embodiment, when the central control device 1 transmits the dummy transmission signal and is always in the interrupt standby state, and the monitoring terminal 2 has the monitoring input and the interrupt signal is transmitted. Since the response data is sent back immediately from the interrupt generation terminal, the responsiveness is always good regardless of the input timing of the monitoring input even when the number of terminals 2 and 3 increases. It can be done. The control terminal 3 outputs a set signal or a reset signal for controlling the remote control relay 6 based on the control data, and the remote control relay 6 controls the load 7. The control input terminal of the remote control relay 6 By connecting the remote control switches 8 and 8'to the load 7, the load 7 can be controlled in parallel by the control output of the control terminal 4 and the control output of the remote control switches 8 and 8 ', and the operability of the load 7 is improved. You can do it.

Next, the gist of the present invention will be described. FIG. 1 shows an exploded perspective view of a relay unit 50 that combines the functions of the control terminal 3 and the remote control relay 6, and FIG. 3 shows a block diagram of the relay unit 50. Therefore, the relay unit 50 has a terminal function similar to that of the control terminal 3, and its circuit configuration is also substantially the same. That is, the transmission signal Vs transmitted via the signal line 4
A signal receiving circuit 51 for receiving the address, an address setting circuit 55 for setting a unique address, a match between the address data of the transmission signal Vs and the unique address is detected, and when the addresses match, the control data is fetched and output to the output circuit 56 as a control output. The remote control relay Rr controlled by the output circuit 56
A signal processing circuit 53 which contacts r ₂₁ ~r ₂₄ outputs the _{1 ~Rr 4} to form a monitoring data based on the monitoring input from the input circuit 54 which is input as a monitoring input, monitoring data to return standby period of the transmission signal Vs The remote control relay 6 is composed of a return circuit 52 for returning a signal to the central control unit 1. The relay unit 50 outputs the drive signal of the built-in remote control relay R _r that takes in the transmitted data and turns the load 7 on and off when it is accessed from the central controller 1 like the control terminal 3. The monitoring data indicating the operating state of the remote control relay R _r is sent back to the central controller 1. In this embodiment, as shown in FIG. 3, there are four remote control relays R _r which are driven and controlled by the output circuit 56, and are of a type having a reset coil Rc and a set coil Sc. It has contacts r ₁₁ to r _{14 for} driving and contacts r _{21 to} r ₂₄ as monitoring inputs. When the load 7 is turned on, a current is passed through the set coil Sc, and when the load 7 is turned off, a current is passed through the reset coil Rc for control. The remote control relays Rr are connected in parallel. However, the remote control relays Rr may be individually connected to the output circuit 56 to control the drive of each.

Next, the structure of the relay unit 50 will be described. First
As shown in FIG. 2 and FIG. 2, the relay unit 50 includes a body 61, a cover 63 covering the body 61, and a printed board block 62 housed in the cover 63. The printed board block 62 includes two printed boards 62a and 62b.
The printed circuit boards 62a, 62b are respectively mounted with electronic components of respective circuits, and in particular, the upper printed circuit board 62a is provided with the address setting switch 55a of the address setting circuit 55, and the lower printed circuit board 62b is A remote control relay Rr is attached to the lower surface. At the end of the cover 63 of the relay unit 50, which is the size of two modules with breaker agreement size, the terminal part where the contact output of the remote control relay Rr is output
64 is formed, and a terminal portion 64a to which the signal line 4 is connected is formed at the opposite other end. The power source of the remote control relay Rr is taken from the signal line 4. Each of the terminal portions 64 is formed with four terminals on the upper side and four terminals on the lower side via a partition wall for insulation, and each connection terminal portion 74 is a terminal board.
65 and a terminal screw 66 screwed to the terminal plate 65. A connecting piece 65a is vertically provided from one end of the terminal board 65.
This connection piece 65a has a through hole 7 formed in the connection terminal portion 74.
It will be directly soldered to the printed board 62a via 5. That is, the connection piece 65a of the terminal board 65 is inserted into the insertion hole 62c of the printed board 62 and soldered. By the way, as shown in FIG. 2 (a), the structure of the terminal portion 64 includes terminals and
Since the contacts r ₁₁ to r ₁₄ are inserted between and, and, when the load is controlled by sharing one wire,
Since the feed wiring of the number terminal is common to one wire, the feed wiring can be easily performed.

In addition, a recess 67 is formed substantially in the center of the upper surface of the cover 63, and a window hole 68 for address setting is opened in the bottom surface of the recess 67, and the address setting cover 69 is formed in the recess 67. I am trying to cover it. Also, the terminal cover on the terminal 64.
70 is covered by screwing a screw 71 into the screw hole 72. The cover 63 and the body 61 are screwed and fixed by an assembly screw 73. The relay unit 50 is used together with the control terminal 3 and the remote control relay 6 driven by the control terminal 3 as shown in FIG.

4 to 6 show the mounting structure of the address setting cover 69. A shaft 76 is integrally projected at both lower ends of the address setting cover 69, and a notch 81 is cut out at the center of the upper part. . An address setting switch 55a such as a dip switch of the address setting circuit 55 is exposed in the window hole 68, and a notch 77 into which the shaft 76 is inserted is formed in the recess 67 side of the cover 63. An insertion groove 78 is formed on the side of the recess 67 in communication with the notch 77 and the recess 67. The shaft 76 of the address setting cover 69 is recessed 67 through the notch 77 and the insertion groove 78.
The address setting cover 69 is rotated by the groove 79 provided on the bottom surface of the recess 67. In addition, a pair of ribs 80 are integrally projected on the bottom surface of the recess 67.
The cover 63 prevents the cover 63 from falling off. When the address setting cover 69 is opened up to 90 degrees as shown in FIG. 6, the lower corner 63a of the address setting cover 69 rides over the groove 79 so that the address setting cover 69 can be fixed.
Further, when the address setting cover 69 is closed, the projecting rib 82 of the address setting cover 69 is fixed by being caught on the upper edge of the concave portion 83 formed by cutting the side surface of the concave portion 67 into the hollow cover 63. . Therefore, when setting the address of the address setting circuit 55, the opening and closing of the address setting cover 69 can be smoothly performed by the shaft 76, and it is not necessary to remove the address setting cover 69 from the recess 67 and the address setting cover 69 is lost. There is nothing to do.

[Effects of the Invention] As described above, the present invention connects a central control device and a plurality of monitoring and control terminals to which unique addresses are set by a pair of signal lines, and the central control device controls each terminal. In a remote monitoring and control apparatus adapted to time-division multiplex-transmit the monitoring data of the load control operation switch and the control data of the load control relay based on the monitoring data by appropriately accessing the load control device, Since the relay unit is built in the control terminal, it is not necessary to drive and control the remote control relay via the control terminal as in the past, and the relay unit directly transmits the transmission signal from the central control unit. This has the effect of being able to receive and control the load.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a relay unit according to an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are a plan view and a cutaway side view of the same, FIG. 3 is a block diagram of the same, and FIG. The figure which shows the attachment structure of the cover same as the above, FIG. 5 is an enlarged perspective view of the principal part of the same,
FIG. 6 is an enlarged cross-sectional view of an essential part of the above, FIG. 7 is a block circuit diagram showing a schematic configuration of a remote monitoring control device of the same, FIG. 8 is a schematic block diagram of an essential part of the same, and FIG. A block circuit diagram of the control device, FIGS. 10 (a) and 10 (b) are circuit diagrams of main parts of the control terminal unit and the remote control switch, FIG. 11 to FIG. 13 are operation explanatory diagrams of the same, and FIG. 14 is the same. 2 is a component showing the wiring of FIG. Reference numeral 1 is a central control unit, 2 is a monitoring terminal device, 3 is a control terminal device, 4 is a signal line, and 50 is a relay unit.

Claims (1)

[Claims] 1. A central control unit and a plurality of monitoring and control terminal units each having a unique address are connected by a pair of signal lines, and the central control unit appropriately accesses each terminal unit to perform load control. In a remote supervisory control device that time-division multiplex-transmits the monitoring data of the operation switch and the control data of the load control relay based on the monitoring data, the load control relay is built in the control terminal device. A terminal unit of a remote monitoring and control device, characterized by comprising a relay unit.